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2 years ago

Please help i dont undertand it

Mathematics

2 answers:

padilas [110]2 years ago

6 0

1/2 of the rectangle is shaded and they are looking for area so it would be 14 times 8 and to combine that it would be 1/2(14 times 8)=56

n200080 [17]2 years ago

5 0

B
AKA 2

I have Khan Acadamy!!

Your welcome!

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0.2x+2.7x−8.1=6.9+1.1x<br> plz help<br> 25 points on the line

ololo11 [35]

Answer:

Step-by-step explanation:

0.2x + 2.7x - 8.1 = 6.9 + 1.1x

0.2x + 2.7x - 1.1x = 6.9 + 8.1

1.8x = 15

x = 15/1.8

x = 8.33

6 0

3 years ago

I have nooooo clue, please help

Aleksandr-060686 [28]

Answer:

case a) $x^{2}=3y$ ----> open up

case b) $x^{2}=-10y$ ----> open down

case c) $y^{2}=-2x$ ----> open left

case d) $y^{2}=6x$ ----> open right

Step-by-step explanation:

we know that

1) The general equation of a vertical parabola is equal to

$y=a(x-h)^{2}+k$

where

a is a coefficient

(h,k) is the vertex

If a>0 ----> the parabola open upward and the vertex is a minimum

If a<0 ----> the parabola open downward and the vertex is a maximum

2) The general equation of a horizontal parabola is equal to

$x=a(y-k)^{2}+h$

where

a is a coefficient

(h,k) is the vertex

If a>0 ----> the parabola open to the right

If a<0 ----> the parabola open to the left

Verify each case

case a) we have

$x^{2}=3y$

$y=(1/3)x^{2}$

$a=(1/3)$

$a>0$

therefore

The parabola open up

case b) we have

$x^{2}=-10y$

$y=-(1/10)x^{2}$

$a=-(1/10)$

$a$

therefore

The parabola open down

case c) we have

$y^{2}=-2x$

$x=-(1/2)y^{2}$

$a=-(1/2)$

$a$

therefore

The parabola open to the left

case d) we have

$y^{2}=6x$

$x=(1/6)y^{2}$

$a=(1/6)$

$a>0$

therefore

The parabola open to the right

3 0

2 years ago

At an ice cream shop, 2 of the last 14 cones sold had cookie dough ice cream. what is the experimental probability that the next

Kay [80]

1 $\frac{1}{7}$

7 0

3 years ago

Which expressions are listed in the simplest form? Check all that supply

Nimfa-mama [501]

Add a picture please?

6 0

3 years ago

Read 2 more answers

Which of the following groups of terms can be used interchangeably when working with normal distributions?

BARSIC [14]

Answer:

The correct answer is D) areas, probability, and relative frequencies

Step-by-step explanation:

This is because each of these terms refers to an amount of space surrounding the mean on the normal distribution curve. Each of them let's us know how likely a spot is to have a value within it.

The z-score would not fit this as it identifies the value and how far away a single spot on the graph would be.

5 0

3 years ago